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9 April 2012 Leopardus braccatus (Carnivora: Felidae)
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Abstract

Leopardus braccatus (Cope, 1889) is a small felid—not much larger than a domestic house cat—commonly called the Pantanal cat. No comprehensive surveys have been conducted to determine how many L. braccatus exist in the wild. It is found in humid, warm grasslands and wooded areas of extreme northwestern Argentina, southwestern and south- and north-central (newly reported ranges) Brazil, Paraguay, and Uruguay. Habitat loss and degradation are considered major threats throughout most of its range. It is uncommon in captivity and museum collections, listed with all Felidae under Appendix II of the Convention on International Trade in Endangered Species of Wild Fauna and Flora, and considered “Near Threatened” by the International Union for Conservation of Nature and Natural Resources in the pampas cat group ( =  L. colocolo).

Synonymies completed 16 January 2012

  • Leopardus Gray, 1842

  • Felis Linnaeus, 1758:41. Part (Felis pardalis Linnaeus, 1758).

    Leopardus Forskål, 1775:V. Nomen nudum.

    Puma Jardine, 1834:266. Part (Puma pajeros: Jardine, 1834 [ =  Felis pajeros Desmarest, 1816]).

    Leopardus Gray, 1842:260. Type species Leopardus griseus Gray, 1842 ( =  Felis pardalis Linnaeus, 1758), by subsequent designation (Pocock 1917:344, footnote).

    Noctifelis I. Geoffroy Saint-Hilaire 1844:37. Nomen nudum; not “Felis à pupille variable” (vide Kretzoi and Kretzoi 2000:257).

    Oncoïdes Severtzov, 1858:386. Type species Felis pardalis Linnaeus, 1758, by subsequent designation (Allen 1905:179); proposed as a subgenus of Felis Linnaeus, 1758.

    Dendrailurus Severtzov, 1858:386. Type species Felis strigilata Wagner, 1841, by monotypy; proposed as a subgenus of Felis Linnaeus, 1758.

    Oncifelis Severtzov, 1858:386. Type species Felis geoffroyi d’Orbigny and Gervais, 1844, by monotypy; proposed as a subgenus of Felis Linnaeus, 1758.

    Noctifelis Severtzov, 1858:386. Type species Felis guigna Molina, 1782, by monotypy; proposed as a subgenus of Felis Linnaeus, 1758.

    Lynchailurus Severtzov, 1858:386. Type species Felis pajeros Desmarest, 1816, by monotypy; proposed as a subgenus of Felis Linnaeus, 1758.

    Pardalina Gray, 1867:266. Type species Pardalina warwickii Gray, 1867 ( =  Felis geoffroyi d’Orbigny and Gervais, 1844), by monotypy.

    Pajeros Gray, 1867:269. Type species Pajeros pampanus Gray, 1867 ( =  Felis pajeros Desmarest, 1816), by monotypy.

    Pardalis Gray, 1867:270. Type species Felis pardalis Linnaeus, 1758, by absolute tautonomy (Allen, 1919a); proposed as subgenus of Felis Linnaeus, 1758.

    Margay Gray, 1867:271. Type species Felis macroura Wied-Neuwied, 1823 ( =  Felis wiedii Schinz, 1821), by subsequent designation (Allen 1916b:580, footnote); proposed as subgenus of Felis Linnaeus, 1758.

    Panthera: Fitzinger, 1869:246, 253, 270, 276. Part (Panthera tigrinus: Fitzinger, 1869:246 [ =  Felis tigrinus Schreber, 1775]; Panthera pardalis: Fitzinger, 1869:253 [ =  Felis pardalis Linnaeus, 1758]); Panthera geoffroyi: Fitzinger, 1869:270 [ =  Felis geoffroyi d’Orbigny and Gervais, 1844]); and Panthera pajeros: Fitzinger, 1869 [ =  Felis pajeros Desmarest, 1816]).

    Herpailurus: Pocock, 1917:346. Part (Felis geoffroyi d’Orbigny and Gervais, 1844).

    Oncilla J. A. Allen, 1919b:358. Type species Felis pardinoides oncilla O. Thomas, 1903, by original designation.

    Mungofelis Antonius, 1933:13. Type species Felis braccata Cope, 1889, by monotypy; proposed as a subgenus of Felis Linnaeus, 1758.

    Oreailurus Cabrera, 1940:16. Type species Felis jacobita Cornalia, 1865, by original designation.

    Pseudolynx: Schwangart, 1941:36. Type species Lynchailurus (Pseudolynx) kriegi Schwangart, 1941, by original designation; proposed as a subgenus of Lynchailurus Severtzov, 1858; preoccupied by Pseudolynx Girault, 1916 (Hymenoptera).

    Montifelis Schwangart, 1941:37. Type species Felis colocola Molina, 1782, by original designation.

    Colocolo Pocock, 1941:269. Type species Felis colocola: Pocock, 1941 ( =  Felis jacobita Cornalia, 1865; not Felis colocola Molina, 1782), by original designation.

    Severtzowicus Kretozoi and Kretozoi, 2000:375. Junior objective synonym of Noctifelis Severtzov, 1858; proposed as a replacement name for Noctifelis Severtzov, 1858 under the mistaken assumption that Noctifelis Severtzov was preoccupied by Noctifelis Geoffroy Saint-Hilaire, 1844.

    Context and Content. Order Carnivora, suborder Feliformia, family Felidae, subfamily Felinae. The relationships within this genus are controversial and currently in flux (see species' “Context and Content” for relationships as they pertain to this species). We have chosen to follow Wozencraft (2005), who listed 9 species (braccatus, colocolo, geoffroyi, guigna, jacobitus, pajeros, pardalis, tigrinus, and wiedii) under Leopardus.

  • Leopardus braccatus (Cope, 1889)

  • Pantanal Cat

  • Felis braccata Cope, 1889:144. Type locality “province of Rio Grande do Sul, or in Matto Grosso,” Brazil; restricted to “Chapada, Matto Grosso” by J. A. Allen (1919b:378).

    Lynchailurus pajeros braccatus: J. A. Allen, 1919b:376. Name combination.

    Felis (Mungofelis) braccatus: Antonius 1933:13. Name combination.

    Lynchailurus colocolus braccatus: Cabrera 1940:12. Name combination.

    Felis colocola muñoai Ximenez, 1961:1. Type locality “Uruguay.”

    Leopardus braccatus: Wozencraft, 2005:537. First use of current name combination.

    Context and Content. Context as for genus. Taxonomy of South American small felids has been in flux for at least the past several decades. They have been classified under various genera (e.g., Felis, Leopardus, Lynchailurus, and Oncifelis) and have been split into separate species (e.g., Garcia-Perea 1994; Wozencraft 2005), often monotypically, or lumped with various combinations of subspecies (e.g., Sunquist and Sunquist 2002, 2009). Relatively recent molecular evidence (Cossíos et al. 2007, 2009; Johnson et al. 1996, 1999, 2006; Johnson and O'Brien 1997; Masuda et al. 1996; Mattern and McLennan 2000; O'Brien and Johnson 2007; O'Brien and Yuhki 1999; Pecon-Slattery and O'Brien 1998) suggests a phylogeny favoring various subspecific designations, in contrast to systematic conclusions based on just morphological characteristics that suggest unique species (Garcia-Perea 1994).

    Using morphological characteristics, Garcia-Perea (1994) assessed the taxonomy of some South American small felids, formerly grouped under Felis colocolo, with 86 specimens from Argentina, Brazil, Chile, Ecuador, Paraguay, Peru, and Uruguay, consisting of 72 study skins and 51 skulls, from 8 North American, South American, and European collections. She grouped them under Lynchailurus into 3 species: braccatus (with the 2 subspecies above; Fig. 1), pajeros (7 subspecies), and colocolo (2 subspecies).

    Fig. 1.

    Leopardus braccatus munoai exhibited as gato palheiro ( =  Leopardus colocolo) at Zoológico del São Paulo. Photograph by Mácia Motta, copyright 2004, available at the Tree of Life Web Project 2010 ( http://tolweb.org/onlinecontributors/app?page=ViewImageData&service=external&sp=29125, accessed 18 January 2012).

    i1545-1410-44-1-16-f01.tif

    The size of the ectotympanic bone relative to caudal entotympanic bone of Leopardus is usually consistent within species, but some variation in the inflation of the posterior chamber may be seen among species (Garcia-Perea 1994). Two to 5 distinguishing characteristics of the skulls (e.g., bullar region, orbital region, palatal region, and neurocranium) and teeth were found among the various specimens of Leopardus, designated collectively as “pampas cats” (Garcia-Perea 1994). Small felids generally show a great deal of variation in coat patterns and colors. Considering all metrics, as well as geographic affinities, Garcia-Perea (1994) classified 3 “types” of pampas cats and concluded that colocolo should be split into 3 species (braccatus, colocolo, and pajeros) with which Wozencraft (2005) concurred. Sunquist and Sunquist (2009:146) formally considered braccatus to be 1 of 8 subspecies of L. colocolo, but they noted that “braccatus and pajeros likely represent distinct species.” Most recently, Nascimento (2010), in his unpublished dissertation, identified 16 species of Leopardus based on 29 cranial measurements and 14 additional morphological traits from 591 museum specimens; he elevated L. braccatus munoai to a full species. Conservation of South American small cats may be the most significant and pressing reason to consider their populations unique enough for special recognition and action (Johnson et al. 1999).

    Here, we followed Wozencraft (2005), who listed 2 subspecies of braccatus:

    L. b. braccatus (Cope, 1889). See above.

    L. b. muñoai Ximenez, 1961. See above.

    Nomenclatural Notes. The etymology of Leopardus braccatus is Latin meaning lion–panther and wearing breeches. Common names of L. braccatus include Pantanal cat, gato palheiro (Garcia-Perea 1994), and bush cat (Miller 1930).

    DIAGNOSIS

    The ectotympanic bone of Leopardus braccatus lacks significant posteroventral expansion or inflation and represents only 20–25% of the bullar volume, in contrast to the colocolo, L. colocolo (40–50%), and the pampas cat, L. pajeros (25–35%—Garcia-Perea 1994). Shape of the notch for the postpalatine vein in the palate is “narrow and deep” in L. braccatus and “wide and comparatively shallow” in L. colocolo and L. pajeros (Garcia-Perea 1994:11). The frequency of the presence of P2 is higher in L. braccatus (63%, n  =  8) than in L. colocolo (33%, n  =  6) and L. pajeros (0%, n  =  21). Shape of the main cusp (paracone) of L. braccatus is “short and wide in lateral aspect, lacking the sharp appearance” seen in L. colocolo and L. pajeros (Garcia-Perea 1994:15). The anterior cusp (parastyle) of P3 tends to be absent in all felids except big cats (Salles 1992); however, Gracia-Perea (1994) noted its presence in 3 specimens that she classified as L. braccatus and its absence in L. colocolo and L. pajeros. Lingual tubercles on c1 occur with the highest frequency in L. braccatus and at very low frequency in L. pajeros; they are absent in L. colocolo (Garcia-Perea 1994).

    GENERAL CHARACTERS

    Garcia-Perea (1994) describes all species in the “pampas cat” group, including Leopardus braccatus, as follows: face has 2 transverse brown to black lines that cross each cheek; superior line starts in the external corner of the eye; inferior line is almost parallel running up around the lateral side of the cheeks; and a 3rd line appears in some specimens at the dorsal end of the inferior line coming from under the chin and throat, creating a sharp angle where the 2 meet on the lateroposterior side of the cheeks. Underside of the chin is white; throat is the same color as the basic coat color, or is somewhat lighter orangish brown, and has 2 or 3 brown stripes that originate on 1 side of the neck and run under the throat to the other side. There are reports of melanistic “pampas cats” in captivity, but a camera-trap photo in Emas Park, Goiás State, Brazil, seems to be the only known record in the wild (Silveira 2005).

    There are 2 types of pelage in L. braccatus. The 1st type is “almost uniform brown agouti color dorsally” with traces of “dark brown rosettes on flanks” and is characteristic of L. b. braccatus (Garcia-Perea 1994:19;  http://www.catsg.org/catsgportal/project-o-month/02_webarchive/grafics/sept2005.pdf, accessed 18 January 2012). The spinal crest of L. b. braccatus is a little darker than the basic pelage; tail is not ringed but has 2 or 3 lines that do not completely circumvent the tail above a black tip. There are at least 2 (but can be as many as 4) heavy black stripes that wrap around the front legs, and similar stripes on the hind legs, although those stripes may not completely meet on the anterior part of the leg. Spotted ventral markings of L. b. braccatus are black; throat is white, grading into orange behind the 1st throat stripe; feet are black dorsally and ventrally, including wrists and ankles, giving the distinctive appearance of wearing boots (2Allen 1919b; Garcia-Perea 1994; Miller 1930; Pocock 1941). The 2nd pelage type, typical of L. b. munoai, has a background color that is paler and more yellow to orangish on the back and flanks (Fig. 1). Brown spots on flanks are more noticeable than in L. b. braccatus, and the feet are black only on palmar and plantar surfaces. The tail of both subspecies is variously tipped in black. In contrast to L. b. braccatus, the black tip of L. b. munoai is reduced, and the tail itself has only a few discontinuous rings (Garcia-Perea 1994).

    Ears of Leopardus are large and pointed rather than rounded as in other South American small felids (Silveira 1995); they are usually black on the anterior one-half and gray on the rest of the surface (Silveira 1995); and sometimes there is a pale spot toward the tip of the posterior surface of the ear. The hairs are longer on L. braccatus than on other South American species of Leopardus. Head–body length of Leopardus, in general, is 423–750 mm; tail length is 220–330 mm; and mass is 2.9–3.7 kg (Garcia-Perea 1994; Nowell and Jackson 1996; Redford and Eisenberg 1992; Silveria 1995; Sunquist and Sunquist 2002).

    A dorsal crest is distinctive of the pampas cat group, in which hairs are longer (7 cm) than elsewhere on the body and flanks (1–3 cm—2Allen 1919b; Nowell and Jackson 1996). The crest is about 3 cm wide and runs from the back of the neck to the base of the tail; it is reduced in some specimens of L. braccatus, making it rather inconspicuous (Courtenay 2002). Both (nonmelanistic) pelage types have 3 or 4 dark brown, almost black, stripes that circumvent the legs, but they may be incomplete on the inner side of the back legs.

    DISTRIBUTION

    Leopardus braccatus inhabits humid, wet, and warm grasslands and forests of moderate elevation in central South America (Garcia-Perea 1994; Seidensticker and Lumpkin 2004). Two geographically disjunct populations are known to occur east of the Andes (Fig. 2): 1 population in Brazil, Paraguay, and extreme northeastern Argentina (L. b. braccatus) and the other population in Uruguay and Rio Grande do Sul, Brazil (L. b. munoaiCáceres et al. 2008; Garcia-Perea 1994; Nowell and Jackson 1996; Redford and Eisenberg 1992; Sunquist and Sunquist 2009; Ximenez 1961).

    Fig. 2.

    Known distribution of 1, Leopardus braccatus braccatus and 2, L. b. munoai in dark green (Garcia-Perea 1994) and the likely expanded range of the species in lighter green, based on recent observations (Bagno et al. 2004; Chebez et al. 2008; de Oliveira 2006; Sánchez-Soto 2007; Silveira 2005).

    i1545-1410-44-1-16-f02.tif

    Because of its extensive range, L. b. braccatus occurs in many more habitat types than L. b. munoai. A cat matching Garcia-Perea's (1994) description of L. b. braccatus was livetrapped in Minas Gerais, Brazil, except the feet were only black on the palmar and plantar surfaces instead of having the characteristic boot pattern. The Wild Cats of Brazil Project, or Projeto Gatos de Mato–Brasil (de Oliveira 2005, 2006;  http://www.wildcatconservation.org/Wild-Cats-of-Brazil.html, accessed 26 September 2011) also found camera-trap evidence of L. b. braccatus from Maranhão State of northern Brazil; Sánchez-Soto (2007) recorded a road-killed specimen in Mato Grosso do Sul, Brazil; and Chebez et al. (2008) documented its presence in Argentina—all greatly expanding the known range of this subspecies (Bagno et al. 2004; Chebez et al. 2008; de Oliveira 2006; Garcia-Perea 1994; Sánchez-Soto 2007; Silveira 2005). Therefore, the approximate range of L. b. braccatus is between 2°S and 22°S and 45°W and 61°W (Fig. 2). L. b. munoai occurs only in Uruguay and the state of Rio Grande do Sul, Brazil. Its primary habitat is savanna that occurs from sea level to 514 m above mean sea level (Bagno et al. 2004; Chebez et al. 2008; de Oliveira 2006; Garcia-Perea 1994).

    FOSSIL RECORD

    The formation of the Panamanian land bridge permitted endemic small felids of North and Central America to disperse extensively into South America (Eizirik et al. 1998; Johnson et al. 1996; Johnson and O'Brien 1997; O'Brien and Yuhki 1999; Pecon-Slattery et al. 1994; Seidensticker and Lumpkin 2004; Wayne et al. 1989). The land bridge was completely established about 3 million years ago (Coates and Obando 1996), but sea-level changes interrupted its formation several times until the mid-Pleistocene (Beu 2001), suggesting that felid speciation also occurred in South America and recent diversity could be explained by a minimum of 5 or 6 immigrations (Prevosti 2006).

    Nine of the 10 Neotropical small felids are in a monophyletic group known as the ocelot lineage (Collier and O'Brien 1985; Eizirik et al. 1998; Johnson et al. 1999; Mattern and McLennan 2000; Pecon-Slattery et al. 1994; Salles 1992). The fossil record of the ocelot lineage is very fragmentary, but specimens are known from the Ensenadan Age 2–0.5 million years ago (Berta 1983; Prevosti 2006). “Felisvorohuensi from Buenos Aires Province, Argentina, was described by Berta (1983) and considered Plio–Pleistocene in age. Prevosti (2006) restricted the age of this fossil to 0.78–0.5 million years ago after reexamination of biostratigraphic and chronostratigraphic data from the locality.

    The oldest fossils of Leopardus colocolo are from late Ensenadan (0.78–0.5 million years ago) and Bonaerian–Lujanian (0.5 million–8.5 thousand years ago) localities in the Pampean region of Argentina (Prevosti 2006). A fossil of L. colocolo also was found in Tierra del Fuego, Chile, an island not currently inhabited by felids, and thought to be as young as the late Pleistocene or early Holocene (Prevosti 2006). L. colocolo split from the common ocelot ancestor about 1.7 million years ago, based on molecular estimates (Johnson et al. 1999). A fossilized left humerus identified as L. braccatus from the late Pleistocene–early Holocene recently was found in Serra da Bodoquena, Mato Grosso do Sul, Brazil, near the type locality (Perini et al. 2009).

    FORM AND FUNCTION

    Leopardus braccatus has retractable claws that are large, compressed, sharp, and strongly curved (Nowak 1991) and digitigrade adaptations of the feet (Flynn et al. 1988). Except for the pads, hairs occur on the feet that allow it to silently stalk prey (Nowak 1991). Ears are large in relationship to head and forward facing, but they can be rotated slightly. Eyes face forward with binocular vision for sharp visual acuity (Flynn et al. 1988); pupils of the eyes adduct creating a vertical slit. The tongue is covered with sharp-pointed, backward-facing, calcified papillae (Flynn et al. 1988) used for lacerating and retaining food within the mouth and for grooming.

    The skull is rounded and shortened anteriorly (Fig. 3). Published skull measurements of L. braccatus are very limited, but in the 2 populations that Garcia-Perea (1994:table 4) classified as braccatus, ranges (mm) were: greatest length of skull, 94.3–100.5 (4 males); condylobasal length, 89.4–91.8 (4 males); rostral width across the canines, 21.6–24.1 (4 males); mastoidal width, 39.2–42.9 (4 males); interorbital width, 17.2–18.3 (4 males); postorbital width, 27.4–29.7 (3 males); zygomatic width, 62.1–67.5 (4 males and 1 female); length of P4 at the cingulum, 11–13 (4 males and 1 female); and mandibular length, 58.8–63.8 (4 males and 1 female). Dentition reflects the highly predatory lifestyle of an obligate carnivore. The dental formula of L. braccatus is i 3/3, c 1/1, p 3/2, m 1/1, total 30 (Garcia-Perea 1994; Nowak 1991).

    Fig. 3.

    Lateral views of skull (top) and mandible (bottom) and broken piece of premaxillae–nasal and partial orbit (inset) of male Leopardus braccatus; United States National Museum of Natural History, specimen 256127, labeled Oncifelis colocolo braccata, locality “Brazil: Mato Grosso, Descalvados, Upper Paraguay River,” collected by F. W. Miller, 29 November 1925 (see Miller 1930).

    i1545-1410-44-1-16-f03.tif

    ECOLOGY

    Population characteristics

    There has been limited research on the ecology of Leopardus braccatus, so aspects of its ecology and behavior are inferred here from reports on the “pampas cat” group in general (Bagno et al. 2004; Chebez et al. 2008; Cossíos et al. 2007, 2009; Eizirik et al. 1998; Garcia-Perea 1994; Johnson and O'Brien 1997; Johnson et al. 1999; Masuda et al. 1996; Mattern and McLennan 2000; Napolitano et al. 2008; Nowell and Jackson 1996; O'Brien and Yuhki 1999; Pecon-Slattery et al. 1994, 2000, 2004; Pecon-Slattery and O'Brien 1998; Silveira 2005). Longevity ranges from an average of 9 years in the wild up to 16.5 years in captivity (Nowell and Jackson 1996). Litter size is 1–3 kittens, and a captive female gave birth at 24 months of age (Nowell and Jackson 1996; Redford and Eisenberg 1992). Gestation is 80–85 days (Golden 2003).

    Space use

    Home-range size of Leopardus braccatus was 3.07–36.98 km2 (SD  =  23.33 km2) in Brazilian grasslands (Silveira 2005). Individual pampas cats appeared to be diurnal with some crepuscular and only occasional nocturnal activity (Cabrera and Yepes 1960). Radiotracking studies by Silveira (2005:4) found “virtually no activity during night time.” Vocalizations of L. braccatus are similar to other small felids and include meow, growl, spit, hiss, gurgle, and purr (Sunquist and Sunquist 2002).

    Leopardus braccatus is known to occur in many biomes in South America including the Pantanal, Chaco, Pampas, Cerrado, Espinal, Monte, deciduous forests, and transitional areas, all found in Argentina, Brazil, Paraguay, and Uruguay. These habitats are being rapidly converted from native vegetation to cattle ranching and agricultural fields, and severe fragmentation by roads and urban sprawl are growing problems throughout the range of L. braccatus (Bagno et al. 2004; Cavalcanti and Gese 2009; Soisalo and Cavalcanti 2006; Trolle 2003). L. braccatus is reportedly found in pastures and agricultural fields, demonstrating that it can use human-altered habitats (Bagno et al. 2004) and adapt to changing environments. Within the range of L. b. munoai in Uruguay and southern Brazil, the Paraguay and Rio de la Plata river basins are believed to be barriers to dispersal and gene flow (Johnson et al. 1999).

    Leopardus braccatus occupies humid and warm grasslands and forests from sea level to 2,000 m (Garcia-Perea 1994; Johnson et al. 1999). Annual rainfall varies within the range of L. braccatus because it occurs in a wide variety of ecotypes: Chaco (dry forests and wet savannas), annual rainfall 450–1,200 mm (increasing from west to east), winter–summer temperatures 20–23°C; Espinal (xerophitic forests), annual rainfall 400–1,000 mm (increasing from south to north), winter–summer temperatures 15–20°C; and Monte (dry shrub–scrub steppe), annual rainfall 80–200 mm, winter–summer temperatures 13–17°C (Bagno et al. 2004). The vegetation within the range of L. braccatus is generally characterized by a mix of open grasslands to dense woodlands.

    Seasonal precipitation, soil fertility, drainage, fire regime, and climatic fluctuations influence development of the different vegetative stages within the range of L. braccatus (Bagno et al. 2004; de Oliveira-Filho and Ratter 2002; Trolle 2003). Along the transitional zone from grassland to woodland, various vegetative stages have been described. The stages of transition are campo limpo (clean field), a grassland with no shrubs or trees; campo sujo (dirty field), a grassland with a scattering of small trees and shrubs; campo cerrado (closed field), with tree cover of 30–90%; and cerradão (dense woodland), the last stage almost completely covered with large trees and sparse ground-cover layer.

    Leopardus braccatus gets its common name, Pantanal cat, from the Pantanal wetland complex, a 140,000-km2 floodplain of the Paraña–Paraguay watersheds. The Pantanal is typified by a mosaic of the major biomes of central Brazil, Paraguayan Chaco, and Amazonian forest; a matrix of open fields interspersed with isolated patches of secondary forests and gallery forests border intermittent and permanent rivers (Cavalcanti and Gese 2009). The Pantanal is almost totally inundated during the rainy season in October–March, with mean monthly precipitation of 145 mm; during the dry season in April–September, its mean monthly precipitation is only 48 mm. Climate is seasonal, with warm, wet summers and cold, dry winters; winter–summer temperatures are 18–42°C (Cavalcanti and Gese 2009; Trolle 2003).

    When the Pantanal is not seasonally flooded, many small water depressions are dispersed throughout its grasslands or forests. L. braccatus can be found among clumps of tall pampas grass in Uruguay and in low-lying swampy areas (Nowel and Jackson 1996; Silveira 1995; Ximenez 1961). L. braccatus has recently been found much farther north than previously recorded (de Oliveira 2005, 2006), and rates of land conversion and fragmentation of available habitat in the Pantanal are increasing (Cavalcanti and Gese 2009), perhaps putting pressure on L. braccatus to seek out alternative habitats.

    Diet

    Leopardus braccatus appears to feed on ground birds, small mammals, and guinea pigs (Cavia apereaNowell and Jackson 1996; Silveira 1995). Stomach contents of 4 recent road-killed individuals contained small lizards and a colubrid snake (Colubridae)—the 1st record of reptiles in the diet of L. braccatus. Plant material, some beetles, and a small diurnal–crepuscular rodent also were found in the stomachs, suggesting nocturnal and diurnal activity of L. braccatus (Bagno et al. 2004).

    Diseases and parasites

    No specific diseases have been reported for Leopardus braccatus, but Toxoplasma gondii, a parasitic protozoan responsible for toxoplasmosis in humans, was reported in a captive Oncifelis ( =  Leopardus) colocolo in Brazil. Little is known about what role wild felids have in the natural epidemiology of T. gondii, or as a cause of felid mortality or morbidity (Silva et al. 2001). Two captive Oncifelis ( =  Leopardus) colocolo in North American zoos had active feline leukemia virus, and other captive Brazilian pampas cats tested positive for the virus (Filoni et al. 2003). Feline immunodeficiency virus and antibodies to feline coronavirus were reported in captive Brazilian felids including Oncifelis ( =  Leopardus) colocolo (Filoni et al. 2006). Antibodies of Bartonella henselae (a proteobacterium) were found at very high prevalence in free-ranging Brazilian felids, implying the cats act as a reservoir. B. henselae causes cat scratch disease in humans; fleas and ticks in the genus Ixodes may serve as potential vectors for its transmission (Filoni et al. 2006).

    Ticks (Acari: Ixodida) that occur primarily on horses and cattle also occur on carnivores in areas where the original vegetation has been replaced with cultivated pastures and are affected by other anthropogenic disturbances and fragmentation (Labruna et al. 2005). Fungal dermatophytes that can lead to parasitic skin infections and cause superficial mycoses in animals and humans have been found in asymptomatic healthy wild felids in captivity at Fundação Parque Zoológico de São Paulo, Brazil. Samples were taken from 130 adult animals of both sexes, including large, medium, and small cats; specifically, 8 Oncifelis ( =  Leopardus) colocolo were confirmed as asymptomatic carriers and sources of potential infection for other animals and humans (Bentubo et al. 2006). Many captive small felid species show some degree of skin disorders, traumatic lesions, enteritis, and dental disorders (Filoni et al. 2003).

    Interspecific interactions

    Leopardus braccatus is sympatric with other small felids such as L. tigrinus (oncilla or little tiger cat) and L. geoffroyi (Geoffroy's cat—Bagno et al. 2004; Hemmer 1978; Johnson et al. 1999; Silveira 2005). L. braccatus hybridized with L. tigrinus in areas of range overlap (Cossíos et al. 2009; Johnson et al. 1999). Jaguars (Panthera onca) are known to inhabit areas of the Pantanal in Argentina (Soisalo and Cavalcanti 2006), and landscape-level surveys in eastern Paraguay revealed that small spotted cats such as L. braccatus avoid areas where jaguars occur (Zuercher et al. 2001).

    GENETICS

    The genus Leopardus has a reduced number of diploid chromosomes (2n  =  36), unlike other cat genera that have 38 chromosome pairs (Collier and O'Brien 1985; Hemmer 1978; Mattern and McLennan 2000; Wayne et al. 1989). The unique metacentric chromosome, C3, in Leopardus results from the fusion of 2 acrocentric F-group chromosomes.

    Over the last decade, O'Brien and colleagues performed genetic analyses on various aspects of the “pampas cat” genome (including but not limited to Leopardus braccatus), such as phylogenetic reconstruction, gene sequencing of both nuclear and mitochondrial DNA, and protein electrophoresis (Cossíos et al. 2009; Eizirik et al. 1998; Johnson and O'Brien 1997; Johnson et al. 1999; Masuda et al. 1996; Mattern and McLennan 2000; Napolitano et al. 2008; O'Brien and Yuhki 1999; Pecon-Slattery et al. 1994, 2000, 2004; Pecon-Slattery and O'Brien 1998). Contrary to Wozencraft (2005) and the suggestions of Sunquist and Sunquist (2009), those molecular studies suggested that all species split by Garcia-Perea (1994) should be subspecies under L. colocolo. Although O'Brien and colleagues maintained confidence in the origins and blood lines of the samples collected and subsequently used in most genetic studies of L. colocolo (S. J. O'Brien, pers. comm., 2010), many of these samples were not collected from wild-caught individuals, but rather most samples were collected from individuals in various zoos; some with unknown histories or origins. This introduces some degree of uncertainty in taxonomic conclusions to date.

    Genetic studies by Johnson et al. (1999) identified hybrids in the general area of home-range overlap between a male L. braccatus and a female L. tigrinus; the hybrids displayed the tigrina pelage. Trigo et al. (2008) performed further genetic investigations with an expanded data set and found more of the same hybridizations. One animal tested by Trigo et al. (2008) was believed to be a hybrid in the opposite direction (mitochondrial DNA from L. tigrinus introgressed into a L. colocolo) documenting additional crossbreeding within the group; however, the origin and “race” of that animal was unknown. Naturally occurring hybrids may come from areas of distributional overlap, and such individuals may exhibit morphological problems such as unusual penile structure and lack of spermatozoa in ejaculate, as was found in 1 adult male hybrid (Johnson et al. 1999).

    CONSERVATION

    In Brazil and Argentina, Leopardus braccatus is considered “Vulnerable.” The International Union for Conservation of Nature and Natural Resources lists the pampas cat group ( =  L. colocolo) as “Near Threatened” (Pereira et al. 2008) because future population declines are likely to result from land conversion of native habitat to agricultural crops, land degradation from cattle grazing, fragmentation, hunting by local farmers in retaliation for depredation of their chickens, and decline of prey populations (Bagno et al. 2004; Cossíos et al. 2009; Soisalo and Cavalcanti 2006; Trolle 2003). Grazing in the Pantanal has been shown to have adverse impacts on the environment; more specifically, forests in the Pantanal are now dominated by invasive Acurí palms (Attalea phalerata) with little undergrowth and relatively little woody plant species (Trolle 2003).

    For conservation of L. braccatus to be effective, more-specific information is needed about its distribution, population status, ecological requirements, and genetic diversity (Lucherini et al. 2004). Methods to monitor important habitats of L. braccatus will continue to include camera-trapping (Trolle 2003), because the species is recognizable from its coat pattern (Lucherini et al. 2004). Studies have shown genetic differences in alleles of L. braccatus and other closely related Leopardus species (Johnson et al. 1999; Trigo et al. 2008), but more basic research is needed on the systematics of South American small cats in general due to conflicting results from molecular and morphological studies (Sunquist and Sunquist 2009).

    During the Miocene, the climate of Earth changed, resulting in pronounced ecological shifts in habitat characteristics and availability. As parts of South America became more arid and seasonal, the shrub–grassland steppe initially appeared as a continuum of habitats that changed from dense forests to open expanses. Species no doubt adapted to these changes, but populations likely became isolated as preferred habitats became more disjunct. Some species, such as L. braccatus, probably started to exploit newly developing shrublands and grasslands, which provided novel prey (Canepuccia et al. 2008; Hemmer 1979).

    Amid current changes in global climate, precipitation regimes will become altered, and effects of habitat change on species abundance and biodiversity will be amplified, likely increasing emigration and adversely impacting survival rates at the population level (Canepuccia et al. 2008; Hemmer 1979). Areas in Argentina within the current range of L. braccatus have experienced an increase in annual precipitation of 10–30% over the last 50 years (Canepuccia et al. 2008). L. braccatus may face greater threats in low-lying areas with increased precipitation, given that most native uplands have been converted to agriculture (as much as 80% of the Cerrado—Bagno et al. 2004) and are used for grazing. These effects can adversely impact populations, both directly and indirectly, by altering fitness and modifying availability of resources. Prey abundance may be reduced, and den sites may be lost to flooding. These interactions suggest that global climatic patterns could have significant negative impacts at regional and local population scales (Canepuccia et al. 2008).

    To foster the conservation of L. braccatus, the following actions might be beneficial: reduce loss of native habitat to agriculture; identify populations and metapopulations of L. braccatus across its entire range; create conservation areas to minimize further habitat loss and public outreach programs to educate people about the species and its needs; and generally increase awareness of the vulnerability of all species in this part of South America. Furthermore, additional genetic research on wild-caught individuals could help validate or refute earlier genetic research performed on largely captive animals.

    ACKNOWLEDGMENTS

    We thank C. A. Davis, J. H. Shaw, and Z. Roehrs for reviewing drafts of this account and J. P. Jorgenson, Division of Scientific Authority, United States Fish and Wildlife Service, for help with establishing contacts with felid researchers in South America. T. de Oliveira provided support and encouragement for this effort. Logistical and financial support was provided by the United States Fish and Wildlife Service's Oklahoma Ecological Services Field Office and the Oklahoma Cooperative Fish and Wildlife Research Unit (Oklahoma State University, Oklahoma Department of Wildlife Conservation, United States Geological Survey, United States Fish and Wildlife Service, and Wildlife Management Institute, cooperating). The findings and conclusions in this article are those of the authors and do not necessarily represent the views of the United States Fish and Wildlife Service or the United States Geological Survey.

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    Notes

    [1] Pamela Owen reviewed the fossil account and Sergio Solari and Alfred Gardner reviewed the synonymies. Associate editor and Editor of this account was Meredith J. Hamilton.

    American Society of Mammalogists
    Anita L Barstow and David M Leslie "Leopardus braccatus (Carnivora: Felidae)," Mammalian Species 44(1), 16-25, (9 April 2012). https://doi.org/10.1644/891.1
    Published: 9 April 2012
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